If you're asked to create a new iCloud Keychain security code

If you use iCloud Keychain in iOS 8.4 or earlier, or OS X 10.10.4 or earlier, you might see the message "A new security code must be created because of a change to iCloud Keychain servers."

When you see the message, you can update your device's operating system and continue without updating your iCloud Security Code. Your iCloud Security Code is used to verify your identity when you set up iCloud Keychain on a new device and when you recover your iCloud Keychain.

On your iPhone, iPad, or iPod touch

If you select Not Now three times without updating your device, your iCloud Keychain will turn off, and you won't see the security code message again. After iCloud Keychain is turned off, your local keychain won't be affected but your username, passwords, and other keychain items won't update across your devices. And, you can't recover your iCloud Keychain from iCloud.

On your Mac

If you click Reset and Turn off, your iCloud Keychain will be deleted from iCloud and turned off on your device. Your local keychain won't be affected, but your username, passwords, and other keychain items won't update across your devices.

Create a new iCloud Security Code

When you see the message, you can also create a new code and keep using iCloud Keychain on your device.

To update your iCloud Security Code, select Create New Code and follow the steps to create a new one.

Pick a code you can remember. The iCloud Security Code is used to verify your identity when you set up iCloud Keychain on a new device and when you recover your iCloud Keychain.

Learn more

If iCloud Keychain is turned off, update to the latest iOS or OS X version before you set up iCloud Keychain again.